Timing Chain Cover

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Old Bertie
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Joined: Fri Feb 14, 2020 2:01 pm

Timing Chain Cover

Post by Old Bertie » Wed Jun 16, 2021 8:31 pm

I keep seeing the aluminium Timing Chain Cover coming up for sale on eBay and other sites and it seems there is a significant requirement for this spare but in all the years i have owned and driven Austin 10's I have never had the need to replace the timing chain cover although, I have replaced the steel button when worn from time to time as I have also replaced the timing chain very occasionally when rebuilding an engine. Am I missing something and is this a part many owners require and seek out and for what reason?

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peter_winney
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Location: BATH

Re: Timing Chain Cover

Post by peter_winney » Thu Jun 17, 2021 11:14 am

Nor me. Only reason I can think one might be needed is if it broke during removal. Perhaps the sellers are hoping to make cash from some old scrap. A lot of stuff advertised on eBay does not sell but it is a good way of establishing a market value (if it does sell) using the auction facility.
Last edited by peter_winney on Thu Jun 17, 2021 4:17 pm, edited 1 time in total.
Reason: Bit added in brackets
Member since July 1972

phil_taylor
Posts: 202
Joined: Thu Nov 21, 2019 10:49 am
Location: Hampton Hill, Middlesex

Re: Timing Chain Cover

Post by phil_taylor » Thu Jun 17, 2021 3:17 pm

I agree with Peter. The only times I have used a different one is because someone has stripped a thread in the base - easily done if tightened as much as the other ones and if the thread is already worn. Now I tend to helicoil or drill out and tap the next size up bsf thread and am very careful with a short spanner!
Phil

bob_allison
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Joined: Wed Nov 27, 2019 3:20 pm

Re: Timing Chain Cover

Post by bob_allison » Thu Jun 17, 2021 8:18 pm

For anyone interested , I can produce 42T chainwheels ready to fit to the camshaft for a moderate price .

Rod
Posts: 44
Joined: Sun Nov 24, 2019 9:44 am

Re: Timing Chain Cover

Post by Rod » Sun Jun 20, 2021 7:46 am

Bob, the chainwheels you speak of, do they cross over to the 14/6 engine which uses 1F47 (I don't have access to a 10/4 list of Spare Parts). I ask because although I was able to replace the crankshaft sprocket from ATDC spares, I really need to consider replacing the camshaft one too as it is starting to resemble a circular saw blade rather than a sprocket...
Regards
Rod

bob_allison
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Re: Timing Chain Cover

Post by bob_allison » Mon Jun 21, 2021 11:16 pm

In a word , probably . My car is a 12/6 . Easiest if you give me a ring on 01327- 87 77 86 , any time in waking hours .

bob_allison
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Re: Timing Chain Cover

Post by bob_allison » Tue Jun 22, 2021 10:24 pm

What I am trying to say is that the part numbers given in the parts books for each model would seem to be different , although the parts in question may be one and the same . If the club 21t crank sprocket fits your model , then the 42t camshaft sprocket must be the same as mine , unless there are differences in the centre and drive arrangements . 42t platewheels are available off the shelf , you just need to machine the centre to fit your engine , or machine the centre to accept the machined down centre of your old item , registered true and secured with small welds .

Rod
Posts: 44
Joined: Sun Nov 24, 2019 9:44 am

Re: Timing Chain Cover

Post by Rod » Fri Jun 25, 2021 7:44 am

Thanks for the info Bob, good idea (which never occurred to me) of grafting a suitable platewheel onto the original centre.
No hassles with replicating fastening PCD or hub offsets.

bob_allison
Posts: 285
Joined: Wed Nov 27, 2019 3:20 pm

Re: Timing Chain Cover

Post by bob_allison » Fri Jun 25, 2021 10:19 pm

A simple indexing setup will be sufficient for our sort of engines , I wonder if The Austin bothered much . Or Just scribe and dot a line from a tooth to the centre , or the keyway or drive hole . There was actually enough meat in the plate wheel to reproduce the original in one piece . I am lucky to have a toolmaker friend , to whom I turn when I want really accurate work .

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